Aprilaire Humidifier

8/10/2019 Aprilaire Humidifier

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READ AND SAVE THESE INSTRUCTIONS

Owner’s ManualFor Models 350, 360, 400, 400M, 500,

500M, 600, 600M, 700 & 700M

Includes Safety & Operating Instructions

and Warranty Information

Humidifiers



- 1 -

Thank you for your recent Aprilaire® humidifier purchase. We appreciate

your business and are pleased to add your name to our growing list of

customers. You have invested in the highest quality equipment available.

Aprilaire manufactures whole-house indoor air quality products and is a

recognized leader in the heating and air conditioning industry.

Your humidifier will require periodic maintenance to assure continued fine

performance. See page 11 to obtain service parts and/or replacement

Water Panel® evaporators.

Please take a few minutes and read this booklet. This will familiarize you

with the benefits you will receive from the equipment you just purchased

and help you understand the routine maintenance that will be required.

Be sure to register your humidifier warranty online at:

www.aprilaire.com/warranty.

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Operating Instructions – Models 400, 500, 600 & 700 . . . . . . . . . . . . . . . .4

• Digital Humidifier Control Indicator Lights . . . . . . . . . . . . . . . . . . . . . .4

• Blower Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

• Automatic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

• Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Operating Instructions – Models 350, 360, 400M, 500M, 600M & 700M . . .9

Check the Humidifier Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Additional Information for All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Effect of Water Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Annual Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Annual Summer Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Periodic Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13MAINTENANCE INSTRUCTIONS

Models 350 & 360 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Models 400 & 400M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Models 500 & 500M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Models 600 & 600M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Models 700 & 700M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

TABLE OF CONTENTS INTRODUCTION

CAUTION

Sudden operation may cause personal injury or property

damage. Turn the Aprilaire®

Humidifier Control to “OFF” orlowest setting before servicing.

WARNING

120 volts may cause injury from electrical shock.

Disconnect power and shut off water supply before servicing.

Genuine Aprilaire® Replacement Water

Panel

®

evaporators are available from yourinstalling contractor or from most otherheating and air conditioning contractors inyour area.Use thedealer locator in ourwebsite (www.aprilaire.com) or look in theYellow Pages under Humidifying Apparatusor Heating & Air Conditioning Contractors.Purchase only genuine Aprilaire WaterPanels to maintain peak performance.







- 6 - - 7 -

WATER PANEL CHANGE INDICATOR

The control keeps track of humidifier operation time. The yellow “Change

Water Panel” light flashes after a preset amount of running time has

elapsed. This running time is preset by the installer based on the humidifier

model and water hardness.

Refer to the Annual Maintenance section for instructions on changing the

Water Panel or call your heating and air conditioning dealer for service. Afterthe Water Panel is replaced, turn the Control knob to the “Test/Reset”

position until the green “Humidifier ON” light flashes, to reset the Water

Panel change timer.

TEST/RESET

The Test/Reset feature allows the humidifier operation to be checked even if

there is no call for humidity. See “Check the Humidifier Operation” on page 9.

ADDITIONAL INFORMATION

Your humidifier is a precision system that will accurately maintain the RH in

your home. For every 2°F change in outdoor temperature, the Digital

Humidifier Control will automatically adjust the indoor RH by 1%.

The Digital Humidifier Control will accurately control the humidity in your

home to a maximum of 45% RH.

The RH Values in Table 2 are targets based on outdoor temperature and the

Digital Humidifier Control setting. The actual RH may vary due to conditionsin the home (cooking, showering, etc.).

TABLE 2 – % Relative Humidity Guide

Outdoor Temperature (°F)

-10°F 0°F 10°F 20°F 30°F 40°F

1 10% 10% 10% 15% 20% 25%

2 10% 10% 15% 20% 25% 30%

3 10% 15% 20% 25% 30% 35%

4 15% 20% 25% 30% 35% 40%

5 20% 25% 30% 35% 4 0% 45%

6 25% 30% 35% 40% 45% 45%

7 30% 35% 40% 45% 45% 45%

D i a l S e t t i n g

R e l a t i v e

H u mi d i t y ( % )

MANUAL MODE

When installed in the Manual Mode (see Figure B – internal switch in “MAN”position and “M” in the display), it is important to anticipate a drop in outdoor

temperature and reduce the setting accordingly to avoid excessive

condensation. For example, with an outdoor temperature of 20°F the correct

setting will be 35%RH. If thetemperatureis expected to fall to 0°F, then merely

reduce the setting to 25% several hours prior to the temperature change.

See Table 1 forthe recommended settings. These settings, which are based on

years of research, represent a compromise between RH levels that would be

most desirable for comfort and humidity levels that are suitable for protection

of your home and to avoid condensation on your windows. For example, awintertime indoor RH of 50% may be considered ideal for comfort, but

unfortunately, it probably would result in condensation, which can cause

damage to your home. Observing the recommended RH levels on your

Humidifier Control is an important safeguard. Condensation of water on the

inside surface of windows in theform of fogging or frost is usually an indication

of too much humidity. This same condensation can occur in other areas in

your home, possibly resulting in damage.

FIGURE B – Manual Mode

90-1236B

TABLE 1 – Outdoor Temperature/Indoor Relative Humidity

Outside Temperature Recommended RH

+40°F 45%

+30°F 40%

+20°F 35%

+10°F 30%

0°F 25%

– 10°F 20%

– 20°F 15%





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Be sure to keep fireplace dampers closed when not in use. They provide an

excellent escape route for heat, as well as humidity.

On occasion, indoor moisture producing activities such as clothes drying,

cooking, showers, etc., may raise the RH level higher than it should be, even

though the Aprilaire humidifier is not operating. Telltale indications are

condensation or frost on cold surfaces such as windows, doors, walls, etc. If

such condensation persists for several hours, your home should be ventilated

to dissipate the potentially damaging excess moisture.

EFFECT OF WATER CHARACTERISTICS

ADDITIONAL INFORMATION FOR ALL MODELS

WARNING

RISK OF SCALDING. Water temperature over 125˚F can cause severeburns and scald instantly. Shut off the hot water supply beforedisconnecting or tapping into any hot water supply line.

Your humidifier is designed to operate using hot, cold, hard or mechanically

softened water. (Hot water is required for Models 350 and 360 and

recommended for all models to ensure maximum performance.)

Water contains varying amounts of minerals. The residue remaining as a

result of hard water evaporation is primarily calcium and magnesium

components and is usually quite hard, scaly, and dense.

Residue from softened water tends to be soft and fluffy and has a greater

volume than hard water deposits. In either case, the service life of a Water

Panel evaporator will be the same. The Water Panel evaporator should be

changed at least once a year with the exception of Models 400 and 400M

which should be changed at least twice a heating season. In the drain-

equipped models, most of the mineral solids are flushed down the drain.Hot supply water, 140°F maximum, is recommended with drain type

humidifiers for increasing capacity and is required for heat pump and air

handler applications.

For best performance, we recommend that you replace the Water

Panel evaporator in your Aprilaire humidifier at least annually with

the exception of Models 400 and 400M which should be changed at

least twice per heating season.

The “Change Water Panel” indicator light (Digital Control only) will blinkwhen it is time to change your Water Panel. See individual model instructions

for additional maintenance.

To purchase a new Water Panel:

• Call the installer of your Aprilaire humidifier.

This information is often found on your equipment.

• Call your heating and air conditioning dealer.

• Use our “Dealer Locator” at: www.aprilaire.com

• Look in the Yellow Pages under Humidifying Apparatus orHeating & Air Conditioning Contractors.

• If none of the above is successful and you still need information,

please feel free to write us.

• Purchase only Genuine Aprilaire Water Panels to maintain performance.

If your humidifier is equipped with a Digital Humidifier Control with Water

Panel change indicator, after replacing the Water Panel, turn the control

knob to the “Test/Reset” position until the “Humidifier On” light blinks to

reset its timer. (Blower must be operating and HVAC calling for heat.) Be sureto turn the control knob back to it’s original setting. If the “Humidifier On”

light continues to blink, your humidifier is in Test mode. DO NOT LEAVE THE

CONTROL IN TEST MODE OR HUMIDIFIER WILL NOT OPERATE.

ANNUAL MAINTENANCE



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1. Disconnect electrical power to the HVACand shut off water supply.

2. Disconnect the water line at the inletcompression nut.

3. Remove the in-line strainer from insidethe inlet side of the valve by using a small

nail or wire.

4. Flush the in-line strainer clean or replacewith a new strainer, Part No. 4004.

5. Reconnect the inlet water line. Double Wrench to Prevent Leaking.

6. Disconnect the water feed tube at theoutlet compression nut.

7. Inspect the water feed tube by gentlyflexing it and looking for cracks or signs ofwear. Replace tube if it is cracked, brittle,

or has been damaged.

8. Inspect the orifice in the water feed tubeand make sure the small opening isunplugged.

9. Reconnect the water feed tube. Double Wrench to Prevent Leaking.

10. Remove the drain line from the bottom of the humidifier. If applicable, flex itto loosen any mineral deposits or blockages. Flush the drain line with waterunder pressure to clear it of any debris, and slip it back onto the drain fitting.If drain line does not flow properly, replace it. Inspect the drain line to makesure it has a constant downward slope and is not flattened or blocked.

11. Turn on water supply and reconnect electrical power to the HVAC.

WATER LINE INSPECTION AND SERVICE INSTRUCTIONS

NOTE: Periodic inspection and preventative maintenance of your total

heating system is important for efficient and safe operation. Your heating

contractor can service your humidifier when he services the HVAC system.

All models have a distribution tray above the Water Panel, which should be

inspected annually and cleaned of excess mineral deposits.

For Models 400, 400M, 500, 500M, 600 and 600M close the bypass

damper, which is a part of the humidifier, with the small damper handle.

Humidifier Control:

Digital Humidifier Control in Automatic Mode (see Figure A):

No adjustment is necessary.

Digital Humidifier Control in Manual Mode (see Figure B):

Set the knob to the “OFF” position.

Manual Humidifier Control (see Figure C): Set the knob to the

“OFF” position.

PERIODIC PREVENTATIVE MAINTENANCEANNUAL SUMMER SHUTDOWN

INLET

COMPRESSION

NUT

INLET

SOLENOID

VALVE

ORIFICE

OUTLET

COMPRESSION

NUT

IN-LINE

STRAINER

WATER

FEED TUBE

90-1053



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9

12

6

11

10

3

7

8

5

2

1

4

M O D E L S 3 5 0 & 3 6 0

1. Front Cover2. Feed Tube

3. Integral Bypass Damper

4. Water Panel EvaporativeAssembly

5. Distribution Tray

6. “V” Notches

7. Water Panel Evaporator

8. Scale Control Insert/FloatChamber

9. Overflow Drain Line

10. Float Cover

11. Float

12. Water Level Sensor Assembly

1. Note Humidifier Control setting and turn dial to the “OFF” position.

2. Turn off water supply. Turn the integral bypass damper (3) to the “SUMMER” position.

3. Press the tabs in the latches on the top and bottom of front cover (1) and pull cover off basewith both hands.

4. Carefully pull the plastic feed tube (2) out of the distribution tray (5) at the top of the WaterPanel evaporative assembly (4). Tip the Water Panel evaporative assembly forward and lift itout of the humidifier. Do not tip the Water Panel evaporative assembly more than needed toclear the housing to avoid over-bending the water level sensor assembly (12).

5. Unsnap the distribution tray (5) from the scale control insert (8). Lightly scrape out or brushoff any mineral deposits, being careful not to stretch or loosen the synthetic fabric liner.Soaking the tray in vinegar or a lime-removing agent is helpful when trying to removestubborn mineral deposits.

6. Slide the used Water Panel evaporator (7) out of the scale control insert/float chamber anddispose of the Water Panel.

7. Removethe floatcover(10) andinspect thefloats (11) andfloatchamberfor mineral build-up.Remove deposits as needed from floats, float chamber and scale control insert. Wash theparts with a disinfecting cleaner. Reassemble the floats and float cover. Make sure stems ofboth floats extend through openings in float cover and that floats move freely up and down.

8. Inspect the plastic feed tube (2) by gently flexing it and looking for cracks or signs of wear.Replace tube if it is cracked, brittle, or has been damaged.

9. Slide a new Aprilaire No. 45 Water Panel evaporator (7) into the scale control insert/floatchamber (8). Snap the distribution tray (5) back on the scale control insert (8).

10. Reinstall the Water Panel evaporative assembly (4) into the humidifier. Take care not to over-bend thewaterlevel sensorassembly.Pushthe topof theWaterPanel evaporativeassemblyfirmly back until it snaps into place.

11. Push the end of the feed tube back firmly into the distribution tray. Replace the front cover.12. Under normal operation the overflow drain line (9) will never have water in it. However,

inspect it for mineral deposits and replace if necessary. Make sure the drain line has aconstant downward slope and is not flattened or blocked.

13. Turn on the water supply. Return integral bypass damper to appropriate position.

14. Check system operation:Manual Humidifier Control (Model 400M): With the HVAC blower operating, turn upHumidifier Control and check system operation.Automatic Digital Humidifier Control (Model 400): (Automatic or Manual mode) Checksystem operation and reset Change Water Panel indicator by setting the knob to“Test/Reset”. With HVAC blower operating and HVAC calling for heat, humidifier will operatefor one minute. DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.

15. Set Humidifier Control to its original position.

1. Inlet Grille


3. Scale Control Insert

4. Distribution Tray Cover5. Water Panel Evaporator

6. Drain Spud

7. Power Cord

8. Metal Housing

9. Water PanelEvaporative Assembly

1. Note Manual Humidifier Control setting and turn dial to the “OFF” position.

2. Disconnect electrical power and turn off water supply.

3. Remove inlet grille screws (1). Remove grille from metal housing (8).

4. Lift the Water Panel evaporative assembly (9) out of the humidifier housing (8).

5. To remove the distribution tray (2) from Water Panel evaporative assembly (9), push down

on tray and pull out scale control insert (3). To clean the “V” openings of the tray, gently pry the distribution tray cover (4) from the tray. Lightly scrape out or brush off any mineraldeposits, being careful not to stretch or loosen the synthetic fabric liner. Soaking the tray invinegar or a lime-removing agent is helpful when trying to remove stubborn mineraldeposits.

6. Slide the Water Panel evaporator (5) out from the scale control insert (3) and dispose of theWater Panel. Clean the scale control insert of mineral deposits. Replace the Water Panelevaporator (Stock No. 35) with a Genuine Aprilaire Water Panel. Slide the Water Panel backinto the scale control insert (3) and snap the distribution tray cover (4) into the distribution

tray (2). Then snap the distribution tray back into the scale control insert.

7. Inspect the plastic feed tube by gently flexing it and looking for cracks or signs of wear.Replace tube if it is cracked, brittle or has been damaged.

8. Remove the drain line from the bottom of the humidifier and flex it to loosen any mineral

deposits or blockage. Then flush it with water under pressure. If it does not properly clear,replace it. Slip the drain line back onto the drain fitting (6). Make sure the drain line has aconstant downward slope and is not flattened or blocked.

9. Reinstall Water Panel evaporative assembly (9) and intake grille (1).

10. Reconnect electrical power (7) and turn on water supply.

11. Turn up Manual Humidifier Control and check system operation.

12. Set Manual Humidifier Control to its original position.

REQUIRED MAINTENANCE INSTRUCTIONS(APRILAIRE HUMIDIFIER MODELS 400 & 400M)

REQUIRED MAINTENANCE INSTRUCTIONS(APRILAIRE HUMIDIFIER MODELS 350 & 360)

M O D E L 4 0 0 S E R I E SCAUTION

Sudden operation may cause personal injury or property damage.Turn Humidifier Control to “OFF” or lowest setting before servicing.

90-1077

WARNING120 volts may cause serious injury from electrical shock. Disconnectpower and shut off water supply before servicing.

7

6

1

8

3

5

2

4

9



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9

6

3

7

8

5

2

1

4


2. Turn off water supply. Turn the integral bypass damper (3) to the SUMMER position.

3. Press the tabs in the latches on the top and bottom of front cover (1) and pull cover off basewith both hands. Set aside.

4. Carefully pull the plastic feed tube (2) out of the distribution tray (5) at the top of the WaterPanel evaporative assembly (4). Pull this assembly out by grasping at top and tipping out.

5. Unsnap the distribution tray (5) from the scale control insert (8). Lightly scrape out or brushoff any mineral deposits, being careful not to stretch or loosen the synthetic fabric liner.Soaking the tray in vinegar or a lime-removing agent is helpful when trying to removestubborn mineral deposits.

6. Slide the Water Panel evaporator (7) out from the scale control insert (8) and dispose of theWater Panel. Clean the scale control insert of mineral deposits. Replace the Water Panelevaporator (Stock No. 35 for Models 600 & 600M and Stock No. 10 for Models 500 & 500M)with a new Genuine Aprilaire Water Panel. Slide the Water Panel evaporator back into thescale control insertwiththe colored spot up andsnapthe distributiontray (5)backinto place.

7. Inspect the plastic feed tube (2) by gently flexing it and looking for cracks or signs of wear.Replace tube if it is cracked, brittle, or has been damaged.

8. Reinstall the Water Panel evaporative assembly (4) into the humidifier by fitting its drain into the round receptacle at the base of the humidifier. Push the assembly in at the top until itsnaps into place. Push the end of the feed tube back firmly into the distribution tray andreplace the front cover.

9. Remove the drain line (9) from the bottom of the humidifier. If applicable, flex it to loosen any

mineral deposits or blockage. Then flush it with water under pressure. If it does not properlyclear, replace it. Slip drain line back onto the drain fitting. Make sure the drain line has aconstant downward slope and is not flattened or blocked.

10. Turn on the water supply. Return integral bypass damper to appropriate position.

11. Check system operation:Manual HumidifierControl (Models 500M & 600M):With the HVAC blower operating, turn upHumidifier Control and check system operation.Digital Humidifier Control (Models 500 & 600): (Automatic or Manual mode) Check systemoperation and reset Change Water Panel indicator by setting the knob to “Test/Reset”. WithHVAC blower operating and HVAC calling for heat, humidifier will operate for one minute. DONOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.


REQUIRED MAINTENANCE INSTRUCTIONS(APRILAIRE HUMIDIFIER MODELS 500, 500M, 600 & 600M)

1. Front Cover

2. Feed Tube

3. Integral Bypass Damper



6. “V” Notches



9. Drain Line

CAUTIONSudden operation may cause personal injury or property damage.Turn Humidifier Control to “OFF” or lowest setting before servicing.

90-1076

54

72

6

8

1

3

9

M O D E L 5 0 0 & 6

0 0 S E R I E S

1. Humidifier CoverAssembly

2. Base Assembly



5. ”V” Notches



8. Drain Line

9. Power Cord


2. Disconnect electrical power and turn off water supply.

3. Unlatchhumidifierfrontcoverassembly (1)frombaseassembly (2)at thebottomof thecover,lift, and set aside.

4. Pull out the Water Panel evaporative assembly (3) by grasping at the top and tipping out.

5. Unsnapthe distributiontray (4)fromthe scalecontrol insert(7).Lightly scrapeout orbrushoff anymineraldeposits,beingcareful notto stretchor loosen thesyntheticfabricliner. Soakingthe trayin vinegaror a lime-removingagent is helpfulwhen trying to remove stubbornmineral deposits.

6. Slide the Water Panel evaporator (6) out from the scale control insert (7) and dispose of the

Water Panel. Clean the scale control insert of mineral deposits. Replace the Water Panelevaporator (Stock No. 35) with a new Genuine Aprilaire Water Panel. Slide the Water Panelevaporator back into the scale control insert with the colored spot up and snap thedistribution tray (4) back into place.

7. Inspect the plastic feed tube by gently flexing it and looking for cracks or signs of wear.Replace tube if it is cracked, brittle, or has been damaged.

8. Reinstall the Water Panel evaporative assembly (3) into the humidifier by fitting its drain into the round receptacle at the base of the humidifier. Push the assembly in at the top between the retaining ribs that hold the assembly in place in a vertical position.

9. Remove the drain line (8) from the bottom of the humidifier. If applicable, flex it to loosen anymineral deposits or blockage. Then flush it with water under pressure. If it does not clear,replace it. Slip drain line back onto the drain fitting. Make sure the drain line has a constantdownward slope and is not flattened or blocked.

10. Reinstall front cover assembly (1) by hooking at the top of the base assembly (2) and latchingat the bottom.

11. Reconnect electrical power (9) and turn on the water supply.

12. Check system operation:Manual Humidifier Control (Model 700M): With the HVAC blower operating, turn upHumidifier Control and check system operation.Digital HumidifierControl (Model 700): (Automatic or Manualmode) Checksystem operationand reset Change Water Panel indicator by setting the knob to “Test/Reset”. With HVACblower operating and HVAC calling for heat, humidifier will operate for one minute. DO NOTLEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.


NOTE: The motor is permanently lubricated and does not need to be oiled.

REQUIRED MAINTENANCE INSTRUCTIONS(APRILAIRE HUMIDIFIER MODELS 700 & 700M)

WARNINGELECTRICAL SHOCK HAZARD. Can cause injury or death. Disconnectall electrical power supplies before servicing. Turn Humidifier Control

to “OFF” or lowest setting before servicing.

90-1075

M O D E L 7 0 0

S E R I E S



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Visit us on-line at www.aprilaire.com to register your Aprilaire product.

If you do not have on-line access, please mail a postcard with your name, address,phone number, model number of product purchased and date of installation to:

Research Products Corporation, P.O. BOX 1467, Madison, WI 53701

Thank you!

Your Warranty Registration information

will not be sold or shared outside of this company.

10008984 6.10B2205128A ©2010 Research Products Corporation

WARRANTY REGISTRATION

RESEARCH PRODUCTS CORPORATIONPO BOX 1467 • MADISON, WI 53701-1467

Your Research Products Corporation Aprilaire® humidifier unit is expressly warranted for five (5)years from date of installation to be free from defects in materials or workmanship except,however, for the disposable Water Panel which will have to be replaced from time to timedepending upon the amount of use.

Research Products Corporation’s exclusive obligation under this warranty shall be to supply,without charge, a replacement for any part of the humidifier which is found to be defective withinsuch five (5) year period and which is returned not later than thirty (30) days after said five (5) year

period by you to either your original supplier or to Research Products Corporation, Madison,Wisconsin 53701, together with the model number and installation date of the humidifier.

THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPORATION FOR ANY LABORCOSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BYYOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE HUMIDIFIER ITSELF.

IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALLBE LIMITED IN DURATION TO THE AFORESAID FIVE YEAR PERIOD. RESEARCH PRODUCTSCORPORATION’S LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, OTHER THANDAMAGES FOR PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORESAIDIMPLIED WARRANTIES OR THE ABOVE LIMITED WARRANTY IS EXPRESSLY EXCLUDED. THISLIMITED WARRANTY IS VOID IF DEFECT(S) RESULT FROM FAILURE TO HAVE THIS UNITINSTALLED BY A QUALIFIED HEATING AND AIR CONDITIONING CONTRACTOR. IF THE LIMITED

WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED CONTRACTOR, ALL DISCLAIMERS OFIMPLIED WARRANTIES SHALL BE EFFECTIVE UPON INSTALLATION.

Some states do not allow limitations on how long an implied warranty lasts or the exclusion orlimitation of incidental or consequential damages so the above exclusion or limitations may notapply to you.

This warranty gives you specific legal rights and you may also have other rights which vary fromstate to state.

LIMITED WARRANTY

Documents

Aprilaire Humidifier